﻿using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Web;
using System.Web.Script.Serialization;

namespace BaifudataPay.Applib
{
    // using System.Runtime.Serialization.Json;

    /// <summary>
    /// 解析JSON，仿Javascript风格
    /// </summary>
    public static class JsonUtil
    {


        public static T parse<T>(string jsonString)
        {
            using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))
            {
                return (T)new DataContractJsonSerializer(typeof(T)).ReadObject(ms);
            }
        }

        public static string stringify(object jsonObject)
        {
            using (var ms = new MemoryStream())
            {
                new DataContractJsonSerializer(jsonObject.GetType()).WriteObject(ms, jsonObject);
                return Encoding.UTF8.GetString(ms.ToArray());
            }
        }
        /// <summary>
        /// DataTable 对象 转换为Json 字符串
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static string ConvertToJson(DataTable dt)
        {
            JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
            javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
            ArrayList arrayList = new ArrayList();
            foreach (DataRow dataRow in dt.Rows)
            {
                Dictionary<string, object> dictionary = new Dictionary<string, object>();  //实例化一个参数集合
                foreach (DataColumn dataColumn in dt.Columns)
                {
                    dictionary.Add(dataColumn.ColumnName, dataRow[dataColumn.ColumnName]);
                }
                arrayList.Add(dictionary); //ArrayList集合中添加键值
            }

            return javaScriptSerializer.Serialize(arrayList);  //返回一个json字符串
        }
    }
}